• Data Access
  • Your Email  
  • Your Email  
Keep me signed in.
Forgot your password?
Close
  • Forgot Your Password?
  • Enter the email you signed up with and we'll email it to you.
  • Your Email  
Close
Back
MDO
Mining Data Solutions
  • Home
  • Database
  • Subscribe
  • Sign In
  • Sign In
Mexico
Guanajuato Mine (Valenciana Mines Complex)

This page is not tailored to
devices with screen width under 750 px.
 Location:
0 km from Guanajuato, Guanajuato, Mexico

  Address:
Ex Hacienda de Bustos S/N Colonia Cata
Guanajuato
Guanajuato, Mexico
36010
Phone  ...  Subscription required
WebsiteWeb
Additional Resources for Suppliers & Investors
Drill results over 30 g/t Au
Stay on top of recent discoveries.
Search drill results by commodity and grade.
Largest mines in the Americas
Mining and mill throughput capaciites.
Full profiles of select mines and projects.
Deepest underground mines
Shaft depth and mill throughput data.
Full profiles of select mines and projects.
Heavy mobile equipment
HME type, model, size and quantity.
Full profiles of select mines and projects.
Permitting and construction projects
Projects at the permitting or construction stage. Full profiles of select projects.
Mines with remote camps
Camp size, mine location and contacts.
Full profiles of select mines and projects.
Mines & projects in Mexico
A list of country's mines and projects.
Full profiles of select mines and projects.
  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Personnel
  • Filings & News

Thank you for browsing through mine profiles compiled by the Mining Data Online team.

Would you like to subcribe or schedule a Demo?
  • Name:
     
  • Company:
     
  • Position:
     
  • Phone:
  • Email:
  • Message:

Overview

StageProduction
Mine TypeUnderground
Commodities
  • Silver
  • Gold
Mining Method
  • Mechanized Cut & Fill
  • Cut & Fill
Production Start...


Owners

Source:
CompanyInterestOwnership
Minera Mexicana El Rosario, S.A. de C.V. (operator) 100 % Direct
Guanajuato Silver Company, Ltd. 100 % Indirect
Great Panther Mining Limited reports that it has closed the previously announced sale of its Mexican subsidiary Minera Mexicana El Rosario S.A. de C.V., which owns the Guanajuato Mine Complex, the Topia mine, and the El Horcón and Santa Rosa projects, to Guanajuato Silver Company Ltd.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Epithermal
  • Vein / narrow vein
  • Breccia pipe / Stockwork


Summary:

The mineral deposits in the Guanajuato area are classic fissure-hosted low-sulphidation epithermal gold-silver-bearing quartz veins and stockwork. Mineralization of economic importance consists of fine-grained disseminations of acanthite, electrum, aguilarite, and naumannite with accessory pyrite, and relatively minor sphalerite, galena, and chalcopyrite. Gangue minerals include quartz, calcite, adularia, and sericite. The veins are accompanied by hydrothermal alteration consisting of argillic, phyllic, silicic, and propylitic facies. Mineral textures in this zone are typically fracture-filling, drusy, and coliform masses. At Guanajuato, Cenozoic volcanic and volcanogenic sediments unconformably overlie the Mesozoic basement rocks. In the area, the oldest Cenozoic unit is the Paleocene Comanja granite, (66 Ma – 56 Ma), this was followed by the Eocene extrusion of andesite (56 Ma – 33.9 Ma) which was sporadically deposited and contemporaneous with the deposition of the Guanajuato conglomerate in localized grabens. The Guanajuato conglomerate underlies an unconformity beneath a sequence of felsic to mafic volcanic rocks that consist of Oligocene ignimbrites, lava flows and domes (33.9 Ma – 23 Ma). The best mineralization is often found related to bends in the Veta Madre orientation (Barclay, 2007 and Rhys, 2013) such as at San Vicente in the Rayas area, and at Cata and Santa Margarita. These structural bends may be due to changes in rock type competencies, and varying thickne ........


Mining Methods

  • Mechanized Cut & Fill
  • Cut & Fill


Summary:

The Guanajuato Mine Compleex (the “GMC”) comprises the Guanajuato and San Ignacio operations. Typically, all zones at the GMC are extracted by the Cut & Fill mining method.

Guanajuato consists of a series of interconnected, previously independent, mines including Promontorio, Santa Margarita, Rayas, Los Pozos, Cata, Valenciana and Guanajuatito.

Mining at Guanajuato predominantly comprises cut and fill stoping, with some pillar recovery in historic workings, and a few zones where mineralized extensions are discovered and mined over a period of a few months. Mining is generally more selective using jacklegs. However, where possible, mechanized cut and fill is utilized.

Two main shafts serve access to the active mine areas, while several other old shafts provide ventilation support. The Rayas shaft is used for transportation of personnel and supplies, while the Cata shaft, located just above the processing plant is used to transport the mineralized material for milling. These are currently de-energized and access of men and materials and egress of ore is via the Rayas ramps, San Vicente and Guanajuatito that provide the access at each end of the mine network, including for mobile equipment.

Mining is conducted by contractors, primarily sourced from nearby communities, utilizing equipment owned by the Company and the contractors. Mine contractors and equipment are alternated between the mines, including San Ignacio, to accommodate the ........


Crushing and Grinding
Flow Sheet: Source

Crushing & Grinding Circuits
The ore from the 1,000-tonne capacity hopper is transferred along a 48-inch-wide belt to a 24 inch by 36-inch PettiBone jaw crusher where the 12-inch feed is reduced to less than 3-inch diameter. The feed from the jaw crusher exits along a 36-inchwide belt and feeds a 6 ft wide by 20 ft long double bed vibrating Ludowici screen. The Ludowici screen separates the feed by size with the upper bed separating material greater than 1 inch and the lower bed separating material less than ¼ inch. This ¼ inch “fine” material is then fed along a 24-inch belt to a hopper prior to grinding (currently feed on average of 88% less than ¼ to the mill). The over size from the Ludowici screen is fed to a Metso (300HP) secondary cone crusher for further size reduction which is then fed back to the Ludowici screen along a 24-inch belt to ensure the material is the appropriate size for the mill. The crushing circuit has a backup Simmons 5½ short head cone crusher that is utilized as needed.

Milling
Immediately after the crushing, the ore is stored in a series of "fines hoppers" which has a capacity of 1,800 tonnes. This material passes through chutes at the bottom of the hopper to feed three 24-inch-wide belts where the material is weighed (continuous weighing scale) and fed into three twin Denver of 7 ft by 14 ft ball-mills which are coated inside by a chromiummolybdenum alloy shield on the surface of the cylinder and natural rubber on the "heads". The grinding material used in these mills are 2.5-inch diameter high chrome alloy cast balls. The ¼ inch crushed material enters the ball mill where the movement, impacts and attrition from the balls promotes the wet pulverization of the mineral which is discharged by the mill as a "thick mineral pulp" where approximately 70% of the material by weight is solid and the remaining 30% is water. This thick mineral pulp is then diluted by adding water and feeds into 4 by 3-inch Krebs pumps where the material then feeds a series of Gmax G10 hydro-cyclone classifiers (two cyclones per mill) which carry out the classification of fines before entering the flotation circuit (75% of the material passing minus 200 meshes with automatic sampling). The average content of this material is 28% solid by weight and 72% water. The oversize material is returned to the mill for re-grinded in the closed circuit which has a "circulating load" of 350% thus ensuring the best release of the particles of interest. At this stage of grinding, reagents are added as the ore entersthe mills. This includes the addition of two specific reagents which promote the recovery of gold and silver (promoter MaxGold 900 and promoter 7310, both Cyteg brand products).


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits2020201920182017201620152014
Silver oz  ......  Subscription required  ......  Subscription required0001,188,3931,067,991
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Equivalent oz  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202020192018201720162015
Ore tonnes mined  ......  Subscription required7,610 t88,364 t131,335 t136,349 t
Tonnes milled  ......  Subscription required7,610 t88,364 t131,335 t136,349 t180,691 t
Subscription required - Subscription is required.

Reserves at July 31, 2021:
Cut-offs are based on the marginal operating costs per mining area being US$135.70/tonne for Cata, US$135.70/tonne for Santa Margarita, US$96.50/tonne for Los Pozos, US$124.90/tonne for Guanajuatito, US$148.50/tonne for Promontorio, and US$113.10/tonne for Valenciana.

CategoryTonnage CommodityGradeContained Metal
Measured & Indicated 251,666 t Silver 250 g/t 2,021,193 oz
Measured & Indicated 251,666 t Gold 1.76 g/t 14,280 oz
Measured & Indicated 251,666 t Silver Equivalent 400 g/t 3,235,029 oz
Measured & Indicated 251,666 t Gold Equivalent 4.7 g/t 38,059 oz
Inferred 220,760 t Silver 225 g/t 1,597,357 oz
Inferred 220,760 t Gold 1.95 g/t 13,873 oz
Inferred 220,760 t Silver Equivalent 391 g/t 2,776,596 oz
Inferred 220,760 t Gold Equivalent 4.6 g/t 32,666 oz



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 1, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Other 2022
Technical Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Management Discussion & Analysis 2018
Annual Information Form 2016
Corporate Presentation 2016
Management Discussion & Analysis 2016
Technical Report 2016
Management Discussion & Analysis 2015
Subscription required - Subscription is required.

Subscription required - Subscription is required.

Terms of Use Privacy Policy © 2017-2023 MDO Data Online Inc.